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ssbarnea
Level 1 (0 points)

Q: AHT does not start on OS 10.8.2 - I see only  a grey screen, if I stop pressing D computer will boot.

How can I start AHT without an additional install disk - OS X 10.8 was upgraded using App Store so I do not have an install disk on it,

 

When I keep the D key presses after pressing the power button, I do see only the plain gray screen. Few seconds after I release D key, the system will boot normally - if I keep pressing the D key, the system will just stay with the gray screen on.

 

I do want to run AHT to test the memory as I do get 1-2 kernel panics a day, and have no kernel extensions.

MacBook Pro, OS X Mountain Lion (10.8.2), Early 2011 - MacBookPro8,2 8GB

Posted on Nov 5, 2012 11:56 PM

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ssbarnea

Q: AHT does not start on OS 10.8.2 - I see only  a grey screen, if I stop pressing D computer will boot.

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  • Helpful answers

  • by clintonfrombirmingham,

    clintonfrombirmingham clintonfrombirmingham Nov 6, 2012 1:09 AM in response to ssbarnea
    Level 7 (30,009 points)
    Mac OS X
    Nov 6, 2012 1:09 AM in response to ssbarnea

    I just tried the AHT on my late 2011 15" MBP - everything checked out fine (your post just prompted me to make sure that it's working properly - I've nothing going wrong with my computer). You just have to keep that D key held down for a long, long time - don't release it until you see the AHT onscreen.

     

    While you might be able to rule out bad RAM as a problem with your computer, you could also loop tests running the free Rember... and if you're having kernel panics, you could post a log on here to see if someone notices something unusual (I suspect you meant to say that you have no non-Apple kernel extensions?)/

     

    To post a log of your most recent kernel panic, see http://support.apple.com/kb/HT2546?viewlocale=en_US.

     

    Good luck,

     

    Clinton

  • by varajara,

    varajara varajara Nov 9, 2012 7:47 AM in response to ssbarnea
    Level 1 (0 points)
    Nov 9, 2012 7:47 AM in response to ssbarnea

    Same problem here - got 13" mid-2010 MBP running on 10.8.2.

    Read clinton's advise and held D down long-long time - after 55 seconds the system booted to a normal screen.

  • by cbs20,

    cbs20 cbs20 Nov 9, 2012 7:56 AM in response to varajara
    Level 4 (2,785 points)
    Nov 9, 2012 7:56 AM in response to varajara

    The AHT depends on what OS your system shipped with, varajara, your system shipped with Snow Leopard, I'm guessing, so your AHT is on your applications DVD that shipped with it and will need to be inserted in to your optical drive to boot to the AHT. ssbarnea, since your MBP shipped with Snow Leopard, I'm guessing since it is an early 2011, you also need to insert the applicatiosn DVD that shipped with it.